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OpenStudy (anonymous):
this can sound pretty dumb but I kinda need to review the unit circle! for example: when I need to find the "zero's" of 2cosx, how do I know that its pi/2 and 3pi/2???
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OpenStudy (amistre64):
|dw:1376659227642:dw|
OpenStudy (amistre64):
the angles are measured from positive x axis .... 90 degrees gives us y=sin=1; x = cos = 0
OpenStudy (amistre64):
theres not much mystery in it ....
OpenStudy (amistre64):
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